Lid urging structure

Abstract

A lid urging structure includes a housing, a lid pivotally supported on the housing via a link member and switched among a closed position where the lid closes an opening in the housing, a first position in the middle of opening from the closed position, a second position located further in an opening direction, and a fully open position; and an urging member that urges the lid in a closing direction at the closed position and, when the lid is pivoted from the closing direction to the second position by overcoming the urging force, the urging direction is reversed, enables switching from the second position to the fully open position by the urging force. The urging member is formed of a plurality of springs disposed between the link member and the housing. The operating force and the urging force are adjusted by means of a balance between the springs.

What is claimed is: 
     
       1. A lid urging structure comprising:
 a housing forming a space for a refueling port or an electric recharging port in an opening inner part; 
 a lid that is rotatably supported with respect to the housing, and is switched from a closed position where an opening of the housing is closed, to a first position that is partly open from the closed position, to a second position further in an opening direction and to a full-open position; 
 a first link and a second link with one end being pivotally supported by a back side of the lid and another end being pivotally supported by an inner side of the housing; and 
 an urging member that biases the lid in a closing direction at the closed position, and that is able to switch through an urging force from the second position toward the full-open position by reversing an urging direction when a rotation operation is Performed against the urging force from the closing direction toward the second position, 
 wherein the urging member includes a first spring body arranged between the first link and the housing and a second spring body arranged between the second link and the housing, and an equilibrium of each spring body is adjusted to have an operating force that rotates the lid from the closed position to the first position or a first position vicinity against the urging force and an urging force that rotates and biases the lid from the first position or the first position vicinity to the closed position, so that in an operation that closes the lid, after the lid is rotated from the second position in the closing direction by the urging force and stops momentarily at the first position, the lid is once again rotated in the closing direction by the urging force. 
 
     
     
       2. The lid urging structure according to  claim 1 , wherein by the first spring body and the second spring body, a lid opening angle is set at the first position larger than in a case where the first and second spring bodies are respectively used independently. 
     
     
       3. The lid urging structure according to  claim 1 , further comprising:
 a base provided in the housing that pivotally supports the first link and the second link, and regulates an end part side corresponding to the spring body. 
 
     
     
       4. The lid urging structure according to  claim 3 , wherein the first link includes an upper plate part that is pivotally supported by the lid, a middle plate part that is linked to the upper plate part and pivotally supported by the base, and an arm part that is linked to the middle plate part in which a fitting hole is formed in a width direction, and
 the first spring body is arranged between an inner wall of the base provided so as to face the arm part and the arm part with one end being regulated to fit into the fitting hole and another end being regulated to fit into a fitting hole provided on the inner wall. 
 
     
     
       5. The lid urging structure according to  claim 4 , wherein the second link includes a plate body pivotally supported by both the lid and the base, a pair of protruding leg parts to keep an interval on a lower side of the plate body, and a groove part provided on a back surface side of the leg parts, and
 the second spring body is arranged on an inner surface side of the base with one end being regulated to fit into the groove part of one of the protruding leg parts and another end being regulated to fit into a fitting hole provided in the base and penetrating in a vertical direction. 
 
     
     
       6. The lid urging structure according to  claim 1 , wherein each of the first and second spring bodies is a coil spring. 
     
     
       7. The lid urging structure according to  claim 1 , wherein in the full-open position of the lid through the first and second links, an upper side of the first link abuts an inside in a bent shape of the second link, and a base end edge part of the lid abuts a middle plate part of the first link. 
     
     
       8. The lid urging structure according to  claim 7 , wherein second link includes a flat design surface arranged on a space side of the housing, and the design surface is flush with a back wall of the base.